6801. The elevation in boiling point of a solution is proportional to the __________ of the solution.
Molal concentration
Reciprocal of the molal concentration
Normality
Molarity
✅ The correct answer is option A.
Chemical Engineering
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6802. The total volume occupied by a gaseous mixture is equal to the sum of the pure component volumes. This is the __________ law.
Dalton’s
Amgat’s
GayLussac’s
Avogadro’s
✅ The correct answer is option B.
6803. One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m³. It cools to 98°C ; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m³. The amount of water vapour condensed (in kg) is
0
0.065
0.1
1
✅ The correct answer is option B.
6804. Addition of a non-volatile solute to a solvent produces a __________ in its solvent.
Freezing point elevation
Boiling point depression
Vapor pressure lowering
All of the above
✅ The correct answer is option C.
6805. A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that the
Atomic weight of the metal is 4
Equivalent weight of the metal is 4
Atomic weight of the metal is 2
Equivalent weight of the metal is 8
✅ The correct answer is option B.
6806. A fluid gas produced on burning furnace oil contains 0.15 gm mole of CO₂, 0.05 gm mole of oxygen and 0.80 gm mole of N₂. What is its molecular weight?
28.6
30
30.6
32.6
✅ The correct answer is option C.
6807. On addition of 1 c.c. of dilute hydrochloric acid (1% concentration) to 80 c.c. of a buffer solution of pH = 4, the pH of the solution becomes
1
8
4
2
✅ The correct answer is option C.
6808. Gases diffuse faster compared to liquids because of the reason that the liquid molecules
Are held together by stronger inter-molecular forces
Move faster
Have no definite shape
Are heavier
✅ The correct answer is option A.
6809. A chemical process is said to occur under unsteady state, if the
Inventory changes do not take place
Ratio of streams entering/leaving are independent of time
Flow rates & composition both are time dependent
None of these
✅ The correct answer is option C.
6810. Avogadro number is the number of molecules in one __________ of a gas.
Gram
Kilogram
Gm.mole
Litre
✅ The correct answer is option C.